baber/WOPTO huggingface dataset:
Patent GB-179862-A (GB)
Title: Improvements relating to vacuum breakers
IPC: F01B25/00
Filed: 1921-07-26
Abstract: 179,862. Vulcan Boiler & General Insurance Co., Ltd., and Bullock, F. H. July 26, 1921. Condenser systems.- In order to prevent the flooding of an engine cylinder through an undue rise of water in the condensers, a diaphragm k is provided which is pierced by a spear-head f carried on a float b in a chamber a connected to the condenser or the main steam exhaust pipe, when the water rises in this chamber. The diaphragm k is made of vulcanized silk or the like and is carried on a pivoted cup g, which also carries a second diaphragm which can be brought into position after the first is pierced by turning the cap.
Patent GB-1154686-A (GB)
Title: Process for preparing Polymeric Compositions and products thereof
IPC: C08G61/04
Filed: 1967-05-01
Abstract: 1,154,686. Polymeric halocarbons. THIOKOL CHEMICAL CORP. 1 May, 1967 [1 June, 1966], No. 20076/67. Headings C3P and C3R. Compositions comprising a plurality of polymeric halocarbons are prepared by subjecting at least one halocarbon, which is (A) an unsaturated C 2-9  compound and has one or more carbon to carbon double bonds; or (B) a saturated compound which contains one to three carbon atoms bearing at least two different atoms selected from hydrogen and halogen atoms, in gaseous state to corona discharge in a gap up to 5 mm. between two electrodes while using an electric current frequency of 0-10,000 cycles/sec, at a power density of 0À1-5 watts/cm.<SP>2</SP> of the average surface area of both of the electrodes at a pressure of 1-1000 mm. Hg. and at a temperature of up to 1000 C. for 1 sec.-30 min. The halocarbon may be tetrafluoroethylene and/or hexafluoropropylene or mono- or di-chlorodifluoromethane.
Patent GB-1039255-A (GB)
Title: Production of isoprene
Inventor: LUMBROSO DANIEL
IPC: C07C11/18
Filed: 1965-05-12
Abstract: Isoprene is obtained by forming 4,4-dimethyl-metadioxan from formaldehyde and a hydrocarbon mixture containing isobutene and butadiene, submitting the crude dioxan to a catalytic hydrogenative purification at not more than 200 DEG C. and catalytically cracking the product to obtain isoprene.  The purification is effected over a Group Ib or VIII metal at a flow rate up to 30 et./wt./hr.  The hydrogen consumption is preferably 1.5-20 mols. per mol. of 4-vinyl-metadioxan present which may amount to 100-20,000 p.p.m. Preferably at least part of any excess formaldehyde is removed by extractive distillation with water prior to the hydrogenation. The final cracking is effected conventionally.ALSO:Crude 4,4-dimethylmetadioxan obtained from formaldehyde and a hydrocarbon mixture containing isobutene and butadiene, is submitted to a catalytic hydrogenative purification at not more than 200 DEG  C.; the product is cracked to obtain isoprene.  The purification is effected over a Group Ib or VIII metal at a flow rate up to 30 et./wt./hr.  The hydrogen consumption is preferably 1.5-20 mols. per mol. of 4-vinyl-metadioxan present which may amount to 100-20,000 p.p.m.  Preferably at least part of any excess formaldehyde is removed by extractive distillation with water prior to the hydrogenation.
Patent GB-950915-A (GB)
Title: Improvements in adjustable storage racks
IPC: A47B57/40
Filed: 1962-05-24
Abstract: 950,915. Storage racks; joints. PALMERSHILE CO. May 24, 1962 [Sept. 27, 1961], No. 20098/62. Headings A4B, A4H and A4W. An adjustable storage rack as in Specification 930,984 whose rails 13 have connecting members 23, 24 with hooks 24 engage pressed-out slots 17 in uprights 14 with a wedging action is provided with locking devices 27 each comprising a T-shaped member of spring steel or the like which is placed in position as shown in Fig. 2 with tab 31 under the lower edge 19 of an upper slot 17 and the lower, outwardly turned part 37 of extension 33 sprung downwardly and inserted into the upper part of a lower slot 17. The arcuate rectangular portion 28 is stressed by flattening in order to position the lock 27 and so provides the necessary frictional grip, its lower edge 34 prevents the upward movement of hooks 24 immediately below.
Patent GB-226848-A (GB)
Title: Improvements in automobile vehicles
IPC: B62D13/02
Filed: 1924-06-06
Abstract: 226,848. Watson, G. W., and Hingston, W. H. June 6, 1924. Drawings to Specification. Arrangements of hand and foot actuated gear for operating brakes.-In a trailer vehicle having the body supported by a ball-joint on the tractor and by a two-wheeled turntable the brakes are applied from the tractor by disconnectable cables passing round guide pulleys concentric with the ball-joint and the turntable. When the trailer is disconnected from the tractor the brakes may be applied by a hand lever on the trailer acting on the cables.
Patent GB-1215464-A (GB)
Title: Improvements in or relating to coatings for roofs
IPC: E04D13/16
Filed: 1967-05-02
Abstract: 1,215,464. Roof structure. A. E. WALKER. 2 Aug., 1968 [2 May, 1967], No. 20222/67. Heading E1W. A water impermeable film or sheet 14 of a polymeric film-forming material such as polyethylene on the upper surface of a roof deck 11, which may be a concrete slab, is covered by a layer 16 of a closed-cell water-impermeable cellular thermal insulation having on its upper surface a protective layer 19. The protective layer may comprise a mixture of sand and cement modified by the addition of an acrylic resin, or may be provided by paving stones or tiling. The thermal insulation may comprise closed cell cellular plastic foam or foam glass.
Patent GB-348941-A (GB)
Title: Improvements in thermionic generators
IPC: H03B5/10
Filed: 1930-07-03
Abstract: 348,941. Valve generating circuits. TELEPONAKTIEBOLAGET L. M. ERICSSON, 33, Kungsgatan, Stockholm. July 3, 1930, No. 20225. Convention date, July 5, 1929. [Class 40 (v).] To maintain a substantially constant output over a wide frequency range in a valve-generator, the anode circuit of a valve D2 comprises a series-tuned circuit L, C, tuned to the working frequency, and in series with a resistance R4 having the same ohmic resistance as the loss resistance of the circuit L, C at resonance. The impedance of the output circuit is independent of frequency, and a constant degree of back-coupling is applied from a point a on the resistance R4 to a preceding valve through a metallic connection involving no phasechange, so as to maintain the two valves in oscillation. High-tension voltage is fed to the plate of valve D2 through a resistance R3. A second parallel resistance R5 is tapped at b to the input of an amplifier F. A third branch circuit C2, R6 compensates any phase-displacement due to the condenser C. The effective value of the resistances R3, R4, R5 is equivalent to the loss resistance at resonance of the tuned circuit L, C. The series tuning allows the use of a smaller and less expensive condenser combined with a higher inductance than usual.
Patent GB-1017800-A (GB)
Title: A method of controlling the electrical energy derived by a non-linear dielectric element from an alternating voltage source
IPC: G01K7/34
Filed: 1964-05-15
Abstract: 1,017,800. Ferro-electric devices. CESKOSLOVENSKA AKADEMIE VED. May 15, 1964 [May 17, 1963], No. 20317/64. Heading H1K. An alternating voltage of constant amplitude is applied from a source 1 to the terminals of a non- linear dielectric element 2 so that the element is thereby heated to a temperature above the Curie point, a direct voltage from a source 4 being then applied (for example by the closure of a switch 6) to the terminals of the dielectric element 2, causing a decrease in the electrical energy supplied from the alternating voltage source 1 and the stabilization of the temperature of the dielectric element 2. According to the value of the direct voltage applied, this stabilized temperature may be either below or just above the Curie point. A common alternating voltage source may supply a plurality of dielectric elements.
Patent GB-1001841-A (GB)
Title: Glass-enclosed semiconductor device and method of manufacturing same
IPC: H01L21/48
Filed: 1962-05-28
Abstract: 1,001,841. Semi-conductor devices. TEXAS INSTRUMENTS Inc. May 28, 1962 [June 1, 1961], No. 20511/62. Heading H1K. A semi-conductor device is encapsulated in glass in the following way: a glass rod 10 is slotted at 10, 11 as shown in Fig. 2, and slid into a glass sleeve 13. The assembly is heated and drawn down to provide a long glass rod with two formed bores. Several of these are bunched together and cut into beads having lengths of the order of five times their diameters. The leads 28, 29 of a silicon photo-sensitive device (in the embodiment described) 30, Figs. 7 and 8, are slid into the formed bores 21, 22 of one of the cut beads 20, which has a length at least five times its diameter, and the assembly pushed into a glass tube 25 which may have a lens 24 at its closed end as shown. The tube is then flushed with inert gas and heat then applied to seal the tube to the bead and the bead to the leads. If desired, the semi-conductor device may be coated with epoxy resin before assembly. The encapsulation may be used for both photo-conductive and photo-voltaic devices, for other diodes, and for some transistors.
Patent GB-148839-A (GB)
Title: Improvements in or relating to rear axles for automobiles and the like
IPC: B60K17/04
Filed: 1920-07-10
Abstract: 148,839. Auto Motive & Accessory Export Co., (Assignees of Torbensen, V. V.). Feb. 5, 1916, [Convention date]. Axles and axle structures.-The differential casing 10 is bolted to the dead axle 1 and the road wheels are driven through reducing gearing 29 and differential shafts 30 which are enclosed in tubes 11 yieldingly supported by the casing 10 and plates 12 fixed to the axle. The tubes 11 slide loosely into sleeves 14, 16 and are held in place therein 'by packing- rings 15, 17. End flanges on the sleeves limit the movement of the tubes. The sleeve 14 screws into the casing 10 and secures a bearing-member 8 in place. A brake drum 32 surrounds the toothed ring on the road wheel, and any oil dripping from the gearing is kept out of the brake drum by an inclined flange 13 fixed to the axle plate 12.
Patent GB-1254386-A (GB)
Title: Printed circuit board connector
IPC: H01R12/89
Filed: 1970-04-29
Abstract: 1,254,386. Two-part couplings. INTERNATIONAL STANDARD ELECTRIC CORP. 29 April, 1970 [8 May, 1969], No. 20596/70. Addition to 1,249,602. Heading H2E. A printed circuit board connector comprises contacts 36 secured in a housing 12 covered by a plate 38 having an opening 44 for insertion of a printed circuit board 130. A rod 52 having an eccentric portion 56 is positioned in the housing and the portion 56 bears against an insulating plate 72 having receese 84 and ramps 88 which coact with corresponding projections 96 and ramps 98 formed on a trapezoidal cross-section member 92. With the projections 96 fitted in the recesses 84 the printed circuit board 130 is inserted and rod 52 is rotated to the position shown. Plate 72 moves to the left as seen in Fig. 3 and the member 92 moves up the ramps 88 and forces the contacts into engagement with the printed circuit conductors 132 as seen in Fig. 5. On insertion the board rests on a surface 27 formed at one end of the housing and on a top surface 126 of a member 124 at the other end. Guide members 106 are provided on top of the member 92 to separate the contacts. To provide positive return of member 92 and plate 72 a spring may be included between the end 78 of plate 72 and the end face 28 of the housing or the eccentric portion 56 may be wholly enclosed in plate 72.
Patent GB-598890-A (GB)
Title: Improved polymerisation process
IPC: C08F14/08
Filed: 1943-12-09
Abstract: Polymers of vinyl chloride and/or vinylidene chloride with or without another polymerizable compound having a vinyl group directly attached to the carbon atom are prepared by subjecting a two-phase emulsion or dispersion of the monomers in water to the action of heat and/or actinic light and/or a catalytic per-compound in the presence of a watersoluble lower saturated aliphatic carboxylic acid other than a hydroxy-monocarboxylic acid, the amount of the acid being at least 3 1/3 per cent by weight of the remainder of the aqueous phase such that at the temperature of the reaction the mixture remains a two-phase system.  Specified acids are formic, acetic, propionic, oxalic and citric acids.  The preferred amount of acid is at least 5 per cent and the non-aqueous phase is maintained in a dispersed condition by agitation.  Specified catalysts are ammonium, sodium and potassium persulphates and benzoyl and crotonyl peroxides. Dispersing agents such as the sodium salt of sulphated lauryl alcohol may be present.  The preferred ratio of the aqueous phase to the non-aqueous phase is from 0.75 to 1 to 5 to 1. Specifications 395,478 and 410,132 are referred to.
Patent GB-127201-A (GB)
Title: Improvements relating to Furnace Fronts and Valve Mechanism therefor.
Inventor: REID JOHN
IPC: F23M7/00
Filed: 1918-12-11
Abstract: 127,201. Reid, J. Dec. 11, 1918. Furnace fronts; air supply, regulating.-Relates to furnace fronts having mechanism of the type wherein a stop prevents the door from being opened until the air supply is shut off, and consists in a connecting-rod extending downwardly behind the front plate of the furnace from a crank-shaft carrying the stop to a shaft on which the air valves are secured. As shown, a squared shaft 19 carries an operating-handle 24, a stop 18 outside the front plate co-operating with the door latch, and, inside the front plate, a crank 29 from which depends a connecting-rod 33. An air-supply damper 37 is secured to the shaft 35 by a lower block 45 grooved for the shaft, and an upper plate having offset lugs 51, 52 acting as a crank, to which the lower end of the connecting-rod 33 is pinned. Clamping-bolts 46 engage grooves in the shaft 35. A second damper is similarly secured to the other end of the shaft. A spring 32 retains the crank 29 and handle 24 close to the front plate 1.
Patent GB-1361718-A (GB)
Title: Method for recording electron-beam signal
IPC: G03F7/038
Filed: 1972-05-03
Abstract: 1361718 Electron-beam recording process HITACHI Ltd 3 May 1972 [4 May 1971] 20640/72 Heading G2C A process for recording electron-beams comprises the steps of exposing a material comprising a support and a layer of at least 2 polymers which are cross-linked by exposure and in which the minimum exposure for cross-linking is 15 to 50 times as long for one than the other and an electrically conductive layer which may be the support or a layer (e.g. an Al, Au or Ag layer) above or below the polymeric layer and then removing by solvent the areas of the polymeric layer which have not become insolubilized by exposure. Specified polymers are polybutadiene and polyisoprene and such polymers with epoxy groups, polychloroprene, polystyrene and polybutadiene-toluylene di-isocyanate. Mixtures of (a) the same polymer but of different molecular weight, (b) the same polymer but with different amounts of electron-sensitive groups e.g. epoxy groups and (c) different polymers are used to obtain the exposure requirement. The material allows a greater range of electron exposures to be recorded as there is a linear response to exposure changes. It is possible to record the amount of exposure in terms of thickness of the layer as the beam is transmitted through the layer thus allowing insolubilization to occur throughout the layer and thus a layer of varying thickness can be produced on development.
Patent GB-148824-A (GB)
Title: Arrangement for the reception of electrical waves
IPC: H01Q5/50
Filed: 1920-07-10
Abstract: 148,824. Huth Ges., Dr. E. F. April 26, 1919, [Convention date]. Multiplex wireless signalling; aerials; thermionic relays. - Simultaneous reception by frame aerials of a number of messages or different wave lengths is obtained by coupling the aerial circuit to s number of secondary circuits, each tuned tc one of the desired waves. The receptior may be amplified by thermionic valves either before or after separating the various wave lengths. As shown in Fig. 1, the aerial a is connected in series with a number of coupling coils b, c, d and with a tuning condenser k which, however, may be shortcircuited by a switch u to render the aerial circuit aperiodic. Secondary circuits e, f, g tuned to the desired frequencies are coupled on the one hand to the aerial coils b, c, d and on the other hand to the grid circuit of valve amplifiers h. The plate circuits of the valves are coupled reacti vely to the aerial circuit. To render the aerial system non-directional, a pair of frame aerials set up at right angles, or a number of frames arranged symmetrically, may be connected in parallel.
Patent GB-265081-A (GB)
Title: Improvements in waterproof coatings and damp courses for buildings and structures
IPC: E04B1/66
Filed: 1926-08-23
Abstract: 265,081. Forrest, C. N. Aug. 23, 1926. Foundations. - A waterproof coating or damp course for use under a brick or concrete pavement or roadway of a bridge is formed in situ by applying to the surface a layer 3 of hot bitumen or bituminous cement, then a prebituminated but still interstatious openwork fibrous fabric 4 such as a loosely woven textile fabric, and again a layer of hot bitumen 5 which unites with the layer 3 through the fabric. Further layers of fabric and bitumen may be added to make up the thickness desired, and the faeing may be finished with a course of concrete, brick, or tiles.
Patent GB-822531-A (GB)
Title: A process for the production of nitriles or dinitriles
Filed: 1957-07-01
Abstract: Aliphatic nitriles or dinitriles are prepared from the corresponding mono- or dibasic acids or the amides by heating the starting material in liquid form on a heat transfer means to a temperature below the boiling-point, at the prevailing pressure, of the compound to be evaporated, and transferring the evaporated compound by means of a stream of ammonia gas to a reaction zone which is at 250-550 DEG  C. and which contains a catalyst causing splitting off of water.  The liquid starting material is used in as thin a layer as possible, e.g. by using a thin-layer evaporator as the heat transfer means.  The ammonia gas may be used in admixture with water or an inert gas such as hydrogen or nitrogen, and may be at about the same temperature as the heat transfer means or up to the boiling-point of the liquid to be evaporated. Reduced pressure may be employed in the evaporation step.
Patent GB-439063-A (GB)
Title: Method and machinery for making concrete roads
IPC: E01C19/02
Filed: 1934-07-16
Abstract: 439,063. Concrete roads. HOLTER, A., 14, Kirkegatan, Oslo, Norway. July 16, 1934, Nos. 20819 and 20820. Convention dates, July 21, 1933 and Aug. 23, 1933. [Classes 20 (iv) and 107] A method of making concrete road surfaces consists in subjecting a mixture of cement mortar and stones to the treatment of light rollers, e.g. rollers ranging between 1 to 2 tons in weight, the said treatment extending beyond the normal initial setting time and over the whole or part of the period of final setting. The rolling may be combined with harrowing and, as shown, the rotary harrow 9 may be mounted on the frame 8 of the rollers 6, 7. The harrow, which extends over the whole width of the rollers, is raised and lowered by a lever 11 and may have a separate drive. The road surface may be initially prepared by applying in sequence to the road bed, a layer of sand or fine gravel, a reinforcement, a layer of cement and sand mortar, and a top layer of small stones.
Patent GB-149009-A (GB)
Title: Energy translation connection by means of vacuum tubes
IPC: H03F3/02
Filed: 1920-07-12
Abstract: 149,009. Huth Ges., Dr. E. F. Oct. 19, 1918, [Convention date]. Void [Published under Sect. 91 of the Act]. Wireless telegraphy; thermionic relays.-Relates to methods of coupling thermionic valves in cascade. Oscillations received from the aerial 5 and tuned circuit 6 by the grid 3 are rectified or amplified in the plate circuit of the valve 1. The plate circuit includes a large inductance 7 which suppresses high-frequency fluctuations. Connexion with the grid 5 of the second valve 9 is preferably made through the condenser 11. The coil 7 may be shunted by a condenser so as to form a loop tuned to the periodicity to be transmitted. In a modification, an ohmic resistance is used in place of the inductance 7 and an inductance is placed in series with the condenser 11.
Patent GB-149193-A (GB)
Title: Appliance for vacuum tubes
Filed: 1920-07-12
Abstract: 149,193. Loewe, S. July 9, 1918, [Convention date]. Void [Published under Sect. 91 of the Act]. Vacuum tubes -The cathode of a thermionic valve is made of considerable superficial area and is rendered incandescent by giving it a posi. tive potential with respect to an adjacent auxiliary cathode, which may comprise a filament heated by a current. The main cathode pre. ferably encloses the auxiliary cathode Alternating cur. rent may be em ployed for heating the filament, for applying potential to the main cathode, and for energizing the anode circuit of the valve. Figs. 1 and 2 shows two arrangements employing direct and alternating current respectively. As shown in Fig. 1, the auxiliary cathode comprises a filament 5 heated by current from a battery 6, and the electron emission therefrom causes the main cathode 4 to glow when the latter is given a positive potential by the battery 8. The circuits of the grid 3 and anode 2 are coupled to cause oscillations to be produced, the anode being given a positive potential with respect to the main cathcde 4 by a battery 9. In the modification shown in Fig. 2, the auxiliary cathode 5 passes axially through the tubular main cathode 4. The grid 3 is of spiral form, and the anode 2 cylindrical. Current is supplied from an alternator 20 through a transformer 18 having three secondary windings, the first 21 for heating the filament, the second 22 connected across the two cathodes, and the third 23 connected across the main cathode and the anode. The grid circuit is coupled to the anode circuit at the coils 10, and the oscillations are shunted from the transformer winding 23 by a condenser. On account of the unidirectional conductivity of the paths 4, 5 and 2, 4, one-half of the current wave is effective for the path 4, 5 and the other half for the path 2, 4. When, however, both cathodes are incandescent current can pass in both directions between them, and a rectifier 24 may be inserted to prevent this. A battery may be placed in the anode circuit of sufficient voltage to ensure that the main cathode is always negative relatively to the anode. An auxiliary grid may be placed between the two cathodes. In another form of valve the filament is M-shaped and lies between two flat plates or in a box of tantalum or wolfram which constitutes the main cathode. The anodes are in the form of plates arranged at either side of the cathodes. The auxiliary cathode may consist of a layer of potassium, and the valve may contain gas such as argon, heating of the cathode then being unnecessary.
Patent GB-372628-A (GB)
Title: Air blower for dental purposes
IPC: A61C17/022
Filed: 1931-07-22
Abstract: 372,628. Dental air blowers. FRANK, E., 13, Bismarckstrasse, Hungen, and BRINKMANN, K., 10, Roonstrasse, Giessen, both in Germany. July 22, 1931, No. 20961. Convention date, July 23, 1930. [Class 81 (ii).] In an air blower for dental purposes of the kind having a heat accumulator between the pressure bulb and the nozzle, the heat accumulator consists of a container a filled with liquid and enclosed by a heat insulating sleeve c, and the air is conducted through the liquid by means of a metal pipe b. Non-return valves may be placed in the nozzle e of the pressure bulb and in the lower part of said bulb, respectively. An insulating washer d is placed between the heat accumulator and the bulb. The various parts are detachably connected, and the liquid container may be heated in a flame or may be provided with an electric heater k, Fig. 8.